不同近交品系小鼠三叉神经痛差异性研究

来源 :中国神经科学学会第九届全国学术会议暨第五届会员代表大会 | 被引量 : 0次 | 上传用户:super_sxw777
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
  目的 采用十四种近交系小鼠,观察并比较其在三叉神经痛模型前后对疼痛刺激敏感性的变化。方法 采用眶下神经切断手术制备三叉神经痛模型,记录手术前和手术后第14天小鼠耳廓、后爪和尾对机械痛、热痛刺激的反应。机械痛和热痛分别以von Frey毛和激光热刺激诱发。动物的行为学反应按反应强度进行量化。设假手术对照组,仅暴露同侧眶下神经但不切断。结果 (1)生理状况下,对von Frey毛机械刺激,雄性和雌性MRL/MPJ小鼠在耳廓、后爪和尾三个部位均非常敏感;而雄性和雌性B10D2-HC小鼠耳廓较敏感,而后爪和尾的敏感性较弱;AKR/J小鼠耳廓的敏感性在雄性较弱,在雌性却较强。对激光热痛刺激,雌雄C3H/HeJ小鼠耳廓部位均较敏感,而在后爪和尾则较不敏感;雌性DBA/2J小鼠在三个部位均表现强敏感性,而在雄性小鼠,耳廓部位的敏感性较强,后爪和尾敏感性较弱。此外,雌雄MRL/MPJ小鼠的耳廓部位对机械刺激均较敏感,而对热痛刺激却表现弱敏感性。(2)眶下神经切断后,所有品系小鼠的受试部位对两种类型刺激的敏感性均增强。对机械刺激,雌雄C57BL/6J小鼠的耳廓和尾均表现强疼痛增敏,在后爪部位疼痛增敏程度较弱。雄性LP/J小鼠在耳廓和后爪的疼痛增敏较弱,而雌性小鼠在相同部位却表现强疼痛增敏。对于热痛刺激,在不同品系,不同性别和不同部位,也观察到疼痛增敏的差异。结论 不管是生理条件下还是三叉神经痛条件下的小鼠,对机械痛和热痛刺激敏感性的差异不仅存在于同一品系的不同性别之间,也存在于不同品系之间。眶下神经切断可诱导躯体部位伤害感受敏感性的增加,提示扩布性神经病理性疼痛的发生。而这种扩布性神经病理疼痛的程度也存在性别、品系之间的差异。这些结果为进一步分析决定这些差异的基因(簇)提供了实验数据。
其他文献
Objective Microglia are the primary immune effector cells in the brain and play a pivotal role in the neuroinflammatory processes, a critical component in several neurodegenerative diseases.Alcohol ab
Objective Spatial locations of objects in the surrounding environment are not only perceived based on observer-centered (egocentric) coordinate, but also on object-centered (allocentric) coordinate in
Objective Diabetic cognitive dysfunction (DCD), usually accompanied with chronically elevated glucocorticoids and hippocampal astrocytic alterations, is one of the most serious complications in patien
Objective Allelic expression imbalance (AEI) assays are a sensitive method for detecting genetically regulated expression of mRNAs in human tissues.Based on these measurements, it is often possible to
Inhibition of glycosphingolipid (GSL) synthesis reduces amyloid-beta (Aβ) production in vitro.Previous studies indicate that glucosylceramide synthase (GCS) inhibitors modulate phosphorylation of extr
Formaldehyde (FA), a common environmental pollutant, has toxic effects on central nervous system.The detailed mechanism of FA neurotoxicity has not been fully elucidated.In this study, we found that C
In the adult mammals, axotomy of mature neurons in the central nervous system (CNS) triggers massive cell death and failure to spontaneous axon regeneration.The relationship between axotomy-induced ne
Objective Cofilin is the major actin-depolymerizing factor in the CNS for regulation of actin dynamics.Neurodegenerative stimuli can induce the formation of cofilin rod, a pathological structure compo
Malignant glioma is the most common and fatal tumor in central nervous system, with the poor prognosis even with the advanced treatments.Seeking new prognostic factors and molecular targets may contri